<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class='el-icon-arrow-right'>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/roles">角色管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="roleList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="( item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级权限和三级-->
              <el-col :span="19">
<!--                通过for嵌套渲染二级权限-->
                <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[i2 !== 0 ? 'bdtop' : '','vcenter']">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="序号"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
<!--    分配权限-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      @close="setRightDialogClosed"
      width="30%">
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id"
               default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Role',
  data () {
    return {
      roleList: [],
      setRightDialogVisible: false,
      rightsList: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleId: 0
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
    },
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        this.$message.error('删除权限失败！')
      }
      role.children = res.data
    },
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据信息失败')
      }
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
      console.log(this.rightsList)
    },
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    setRightDialogClosed () {
      this.defKeys = []
    },
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      await this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style scoped lang="less">
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eeeeee;
}
.bdbottom {
  border-bottom: 1px solid #eeeeee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
